题目:http://codeforces.com/problemset/problem/264/B 题意:给你一个递增序列,然后找出满足两点要求的最长子序列 第一点是a[i]>a[i-1] 第二点 gcd(a[i],a[i-1])>1 也就是说两个数不能互质 找出最长的子序列长度 思路:首先想互质问题,如果两个数互质说明两个数之间没有素因子相同,我们想以每个素因子结尾的最大长度是多少 然后比如样例 2 3 4 6 9 第一个数 2      2结尾 1 第二个数 3      3结尾 1 第三…

A. Colorful Stones (Simplified Edition) 模拟. B. Roadside Trees (Simplified Edition) 每次转移时,只需要爬到\(min(h_i,h_{i+1})\)位置,然后跳到下一个位置即可. C. Escape from Stones 当\(s_i=l\)时,先输出左边的数,否则先输出\(i\),在处理右边的数. D. Good Sequences \(a_i<a_{i+1}\),那么对于每个\(a_i\)找到所有质因子中最长的…

A. Colorful Stones (Simplified Edition) time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output There is a sequence of colorful stones. The color of each stone is one of red, green, or blue. You a…

Codeforces Round #739 (Div. 3) 20210907.网址:https://codeforces.com/contest/1560. --(叹). A 不希望出现带"3"的数和3的倍数,把剩下的数从小到大排,问第k个是多少.数据范围很小,因此是大水题. B 偶数个人围成圈,按顺时针给每个人编号,不知道总共多少人.问题是,如果知道a和b面对面,那么c和谁面对面.简单的讨论,注意围不成圈的情况(如1和3面对面,问99对面是谁). C 用一种方式(详见题目,很容易的…

Codeforces Round #366 (Div. 2) A I hate that I love that I hate it水题 #I hate that I love that I hate it n = int(raw_input()) s = "" a = ["I hate that ","I love that ", "I hate it","I love it"] for i in ran…

Codeforces Round #354 (Div. 2) Problems     # Name     A Nicholas and Permutation standard input/output 1 s, 256 MB    x3384 B Pyramid of Glasses standard input/output 1 s, 256 MB    x1462 C Vasya and String standard input/output 1 s, 256 MB    x1393…

直达–>Codeforces Round #368 (Div. 2) A Brain’s Photos 给你一个NxM的矩阵,一个字母代表一种颜色,如果有”C”,”M”,”Y”三种中任意一种就输出”#Color”,如果只有”G”,”B”,”W”就输出”#Black&White”. #include <cstdio> #include <cstring> using namespace std; const int maxn = 200; const int INF =…

 cf之路,1,Codeforces Round #345 (Div. 2) ps:昨天第一次参加cf比赛,比赛之前为了熟悉下cf比赛题目的难度.所以做了round#345连试试水的深浅.....       其实这个应该是昨天就写完的,不过没时间了,就留到了今天.. 地址:http://codeforces.com/contest/651/problem/A A. Joysticks time limit per test 1 second memory limit per test 256…

Codeforces Round #279 (Div. 2) 做得我都变绿了! Problems     # Name     A Team Olympiad standard input/output 1 s, 256 MB  x2377 B Queue standard input/output 2 s, 256 MB  x1250 C Hacking Cypher standard input/output 1 s, 256 MB  x740 D Chocolate standard in…

Codeforces Round #262 (Div. 2) 1003 C. Present time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Little beaver is a beginner programmer, so informatics is his favorite subject. Soon his info…